Methodolog for TAM Grout

Methodology for TAM Grouting for ChandPole Gate 1. Scope

of Work: -  To  To execute execute the Tam Tam Grouting for Soil

Stabilization of Chandpole Gate, during construction of tunnel by T! method"

2.

#ist of $%uipment&s i" ii" ii" iii" iii" i4" i4" 4" 4i" 4i" 4ii" 4ii" 4iii iii" ix" ix" x" xi" xi" xii" xii"

xiii"

3. !an

5o9er +" 6" 2" 3"

4.

'(C '(C mak make e )tl )tlas as Copc Copco o *+ *+  um umbe bers rs" " .ril .rilli ling ng bit bit +/0 +/01+ 1+00 00 mm dia, dia, 2 nos nos"" .ril .rilli ling ng 'od +"/m +"/mtr tr,, +3 nos" nos" Grou Groutt 5um 5ump p moto motorr 607 6075 5 *+ umb umber ers s"" !ixi !ixing ng 8ni 8nitt 9ith 9ith 75 75 !ot !otor or,, 2 bags bags Cap Capac acit ity y" )ir )ir Comp Comprressor essor-3 -3/0 /0 C;! C;! *+ umb umber ers s"" Tam 5ipe 3< mm *+ # #ot ot" " =n>at n>atab able le 5ac 5ack kers ers *+# *+#ot )ir 7ose ose 5i 5ipe 6 inc inch, h, 20 'mt 'mt"" #.5 pipe +inch, /0 'mt" Weldi elding ng !ach !achin ine, e, 30 300 0 4ol 4oltt *+ *+ umb umber ers s"" Cutt Cuttin ing g Tor Torch ch Set Set *+ *+ um umbe berrs" s" 5ressure 5ipe System, +/?g1Cm6"

'(C .rill .riller er (pera (perator tor-- 0+ 7elp 7elper er-- 0 06 6 Welde elderr- 06 06 Supe Super4 r4is isor or-- 06

)cti4ities in rief 

 Tam  Tam Grouting Grouting shall be carried carried out prior to T! acti4ity acti4ity to Strength Strength the ground1Soil strata as per the design re%uirement +" 6" 2" 3" /" @"

I.

5reparation 5reparation of of 9orking 9orking platform1bar platform1barricading ricading the 9orking 9orking area Sur4ey Sur4ey and and marking marking of grout grout hole hole point points s .rilling .rilling to re%uir re%uired ed depth depth as per dra9i dra9ing" ng" ;abricati abrication on and lo9eri lo9ering ng of T)! T)! 5ipes 5ipes Slee Slee4e 4e pac packi king ng Grouting

Prepar Preparati ation on of of work working ing platfo platform rm!a !arri rri"a "adin ding g the the work working ing area area Working )rea Shall be barricaded and ground le4eling for placement of e%uipment"

II.

)ll utilities di4ersions o4er heads and belo9 ground shall be checked for any obstructions" 5roper 5lat-form for cement stacking min /0 bags shall be done" #ur$ey and marking of point%  The 9orking platform shall be mark as per sur4ey coordinates, the location of drilling grout holes shall be marked as coordinates mentioned in the dra9ing"  The hole of T)! grout shall be arranged in staggered pattern" &rilling to re'uired depth a% per drawing  The drilling of T)! grouting 7oles shall be carried out using A0-++0 drilling bit 9ith air >ushing arrangement the drilling depth should maintained as the attached dra9ing"  The drilling rig shall be setup at sur4ey marked points "the drilling acti4ates shall be dry drilling 9ith compressed air to remo4e the soil and muck from drilled hole )fter each drill hole location T)! grout pipe is installed the rig shall be taken to another location point at least one hole from each bore location" !inimum 2 hours& time is re%uired for each drilling hole acti4ity and shall not be stopped during the period, as is susceptible to collapse" )a!ri"ation and lowering of TAM Pipe%  The T)! grouting 5ipe used for grouting in stages shall be made of 5BC" The full length of 5BC 5ipe shall be drilled 9ith / to +0 mm slot holes 9ith spacing of 0/ meter hole inter4al  The each #ength of T)! grouting of 5BC pipe is @ m #ength 9ith threads both end and connected socket and glo9  The 5BC tam pipe allo9 the =nection of grout from indi4idual slee4e  The annuals surrounding the 5BC pipe shall packed 9ith good cement mortar" TAM grouting Grouting is the process of Dlling 4oids, ca4ities and pore spaces of soil 9ith grout by replacement of 9ater or air penetrated in ground soil" Grout Mi* &e%ign  The proposed grout mix design shall be Cement *(5C /2 -/0 kg, Water -30 - /0 kg *W1C-0"< to +"0 )dmixture 0"/ E W(C CG 66/ grams per cement bag  The grout Shall be pumped to re%uired pressure / to @ kg 1cm 6 the grout pressure re%uired for cracking of T)! slee4e shall be higher than the speciDed limits mentioned abo4e •

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Grouting %tage %e'uen"e

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Grouting of each T)! pipe shall be carried out in ascending stage of  / meters"  The packer shall be Drst placed at bottom lea4ing / meter depth grout Fone at bottom"  The packer shall be in>ated 9ith packer pump and preparation for grouting shall be started Grout shall be started 9ith mix as stated abo4e and continue till pressure builds up *or grout coming on surface" 5acker in>ation shall be released and packer shall be raised further up / meter abo4e and steps repeated till completed hole is grouted  The packer assembly shall be 9ashed and mo4e to next hole location for carrying out grouting in ascending stage as deDned abo4e"